[AZ-1126] Migrate capturedAt to DateTimeOffset

Co-authored-by: Cursor <cursoragent@cursor.com>

SatelliteProvider.Tests/Validators/UavTileMetadataValidatorTests.cs

@@ -13,7 +13,7 @@ namespace SatelliteProvider.Tests.Validators;
 public class UavTileMetadataValidatorTests
 {
     private readonly UavTileMetadataValidator _validator;
-    private readonly DateTime _now;
+    private readonly DateTimeOffset _now;
 
     public UavTileMetadataValidatorTests()
     {
@@ -23,7 +23,7 @@ public class UavTileMetadataValidatorTests
             MaxAgeDays = 7,
             CapturedAtFutureSkewSeconds = 30,
         });
-        _now = new DateTime(2026, 5, 22, 12, 0, 0, DateTimeKind.Utc);
+        _now = new DateTimeOffset(2026, 5, 22, 12, 0, 0, TimeSpan.Zero);
         _validator = new UavTileMetadataValidator(config, new FixedTimeProvider(_now));
     }
 
@@ -32,12 +32,12 @@ public class UavTileMetadataValidatorTests
     // consumer appears, promote to SatelliteProvider.TestSupport.
     private sealed class FixedTimeProvider : TimeProvider
     {
-        private readonly DateTime _utcNow;
-        public FixedTimeProvider(DateTime utcNow) => _utcNow = utcNow;
-        public override DateTimeOffset GetUtcNow() => new(_utcNow, TimeSpan.Zero);
+        private readonly DateTimeOffset _utcNow;
+        public FixedTimeProvider(DateTimeOffset utcNow) => _utcNow = utcNow;
+        public override DateTimeOffset GetUtcNow() => _utcNow;
     }
 
-    private static UavTileMetadata ValidMetadata(DateTime capturedAt) => new()
+    private static UavTileMetadata ValidMetadata(DateTimeOffset capturedAt) => new()
     {
         Latitude = 50.10,
         Longitude = 36.10,